of milwaukee



v Sept. 10, 1929. A. w. RYBECK 1,727,359

CONCRETE MIXER Filed April 13, 1927 Patented Sept. 10, 1929.

UNITED STATES PATENT OFFICE,

ADOLPH,W. RYBEGK, OF MILWAUKEE, WISCONSIN, ASSIGNOB T '1. L1 SMITH COM- PANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

- CONCRETE mixnn.

Application filed April 13,

In concrete mixers of the conventional type, the ingredients are placed in a skip having its outer receiving end normally disposed on the ground which, when loaded, has its 5 inner end elevated to discharge its contents into a mixin drum. Theskip is substantially of an en arged funnel shape having its outer or receiving end flattened anddirected at an angle to lie horizontally on the ground when in load receiving position, the materials being dumped therein by wheel barrow, or, frequently in largemachines, by dump trucks. In cases where relatively large dump trucks are servicing themixer, it has been found that even though extreme care is exercised in dumping the material into the skip, much is spilt beyond the opening and onto the apron which closes the inner top portion of the skip. This may be overcome by shortsuing the apron to increase the opening and accommodate possible overhanging of the trucks and prevent spilling of material onto the apron, but this is highly impractical, for, when the skip is raised to its discharging position, the material will be thrown onto the machine which causes damage to the working parts thereof as well as wasting the material. Also, when the sand is fairly moist, it piles at the discharge opening causing a part thereof to be thrown out of the skip onto the machine due to the shortness of the apron covering the inner portion of the skip.

Hence, it is an object of this invention to provide a loading skip for concrete mixing machines or the like which has means for preventing the waste of material from the skip as it is raised to discharging position. Another object of this invention resides in the provision of an improved loading skip for concrete mixing machines and the like having means for preventing the overshooting of materials as they are discharged therein which means also prevents the throwing outwardly of the material from the skip as it is moved to its upward position.

A more specific object of this invention resides in the provision of a loading skip apron extension which is in a substantially vertical position free of the skip receiving opening when the skip is in load receiving posi- 1927. Serial No; 183.456.

tion and which forms a continuation of the apron as it is swung to discharge position to thus decrease the receiving open ng and guard against falling of the materials outwardly of the skip other than through its l normal discharge opening.

With the above and other objects in View which will appear as the descriptionproceeds, my invention resides in the novel con struction, combination and arrangement of parts substantially as hereinafter described andmore particularly defined by the appended claims, it being understood that such changes in the precise embodiment ofthe herein disclosed invention may be made as come withinthe scope of the claims.

In theaccompanyi ig drawing, I have illustrated one complete example of thephysical embodiment ofmy invention constructed according tothebest mode I have so far Figure 2 is an enlarged fragmentary dea tail view, partly in sideelevation and partly in section, of the improved loading skip apron extension, and

Figure 3 is a perspective view of the improved extension detached'from the loading skip, a portion thereof being broken away;

p Referring nowmore particularly to the accompanying drawing, in which like numerals designate like partsfthroughout the several views, the numeral 5 designates a concrete mixing machine of any desired construction having a mixing drum 6, a suitable prime mover 7 and a loading skip8 pivotally:

mounted on theframe of the mixer, as at 9, and beingpmovable from a load receiving position to a discharging position by cables 10 connected therewith near its outer free end, as at 11, and wound onto a druinor Windlass 12. a I

I The loading skip has a discharge spout or chute 13 at its inner end whichprojects into the mixing drum whenin discharging posi- The materials, such as sand, gravel, cement and the like are placed in the'open outer end portion of the skip by wheel barrows, trucksor other means and the opening at the outer end of the skip must be suihcient to permit thetrucks to extend thereover and discharge their loads without overhanging the apronls and, at the same time, it is highly desirable that the apron extend outwardly as far as possible,- for frequently in discharging the skip, the materials are thrown outward thereof as it comes to rest,- causing a waste and also damage to the moving parts of the mixer;

To remedy this, I provide improved means forming an extension of the apron 14 when the skip is discharging and, at the same time, not decreasing the material receiving opening when the skip is in load receiving position.

} Fixed to the outer marginal edge portion of the apron 14 and extending from the opposite side walls of the skip is an angle 15 to which a rod or shaft 16 is secured slightly spaced from the vertical portion thereof-by lugs or other i'neans 17, the rod 16 providing a mounting fer the apron extension 18-. The extension 18 is of a shape to conform with the I loading skip and has its ends 19 flanged inwardly to provide tapered sides of greater tlepth at their outer ends, the shaft being hingedly connected with the extension by U- bolts er the like 20 so that'th'e extension may swing to its dotted line position illustratedin Figure 2 to form an extension of the apron It, or to its full line position leaving the load receiving opening "ofthe skip ui'iobstrncted.

The outer marginal "edge of the extension is reinforced or strengthened by an angle 21 secured thereto and fixed to its inner's'ur'face transversely jof the rod 16 are two angle members 22 which extend beyond the inner edge thereof and provide a support fora counterbalance or weight 23-. A plate 24 is carried by the extended ends of the supports '22 to provide a bathe extending inwardly from the extension, for the purpose later described.

With the skip in load receiving position,

the weight or counterbalance 23 swings the j apron extension to an approximate vertical position, as illustrated by full lines in Figures 1 and 2 so that a maximum opening is provided to permit the ready loading of the skip by truck or any means, the extension member also providing a baflie tc p'revent the overshooting of the materials onto the apron 14 as the "skip ifs-loaded. The counterbalance 2-3 and the battle plate 24 extend into the load skip between the material and the skip disgenerally takes place.

charge when the skip is in load receiving position and as the skip is moved to its discharging position illustrated by dotted lines in Figure 1, the action of the weight 23 and the forwardly moving material tend to move the apron extension to its position illustrated by dotted lines in Figures 1 and 2. The movement of the extension to close over the inner end of the load receiving opening is limited by stops 25 carried by the flanges 19 and engaging the top side edges of the skip.

Thus it will be seen that the materials cannot be thrown forwardly out of the skip as the extension with its sides completely closes that portion of the opening where spilling It will also be noted thatthe tapered sides of the extension cause the same to take a position at an angle to the plane of the apron 14, thereby increasing the area of the skip opening at the outer end of the extension.

From the foregoing description taken in connection with the accompanying drawing, it will be readily apparent to those skilled in the art to which an invention of the character described appertains that I provide novel and of materials out of the skip without decreasing its load receiving opening and further that I provide a device which may be readily applied to load receiving skips of any type either at the time of their manufacture or any time thereafter.

WVhat- I claim as my invention is:

1. In a device of the character described, a load receiving skip having an apron termi- 'nating short of its outer end to define a skip load receiving opening, and means movable over the skip load receiving opening as the skip outer end is elevated to form an extension of said apron.

2. In a device of the character described,a load receiving skip having a receiving opening at one end and a discharge opening at the other end, and means operable upon movement of the skip to its discharging position to decrease the size of the receiving opening and direct the skip contents towards the discharge opening.

' 3, In adevice of the character described, a load receiving skip having a receiving opening at one end and a discharge opening at the other there being a passage through the skip from one opening-to the other, movable means mounted adjacent the inner end of the receiving opening and projecting outwardly thereskip when the skip is in a load receiving position to prevent material over-shooting the same and automatically movable to a position where its panel forms a cover for the skip outer end as it is moved to load discharging position.

5. In a device of the character described, a load receiving skip having a receiving opening and a discharge opening, an apron closing the top of the skip inwardly of the receiving opening, an extension member for the apron,

means pivotally mounting the extension member adjacent the receiving opening, and means whereby the extension member stands in a substantially vertical plane when the skip is in receiving and discharging positions, said extension member projecting above the skip when in receiving position.

6. In a device of the character described, a load receiving skip having a receiving opening and a discharge opening, an apron closing the top of the skip inwardly of its receiving opening, an extension member for the apron, means pivotally mounting the extension member adjacent the receiving opening, and means extended into the body of the skip for actuating the extension member, whereby the extension member forms a guard for the material while in loading position to direct the material into the skip and an extension of the apron when in discharging position to prevent the material being thrown out of the skip.

7. In a device of the character described, a load receiving skip having a receiving opening and a discharge opening, an apron clos ing the top of the skip inwardly of its receiving opening, an extension member for the apron, means pivotally mounting the extension member adjacent the receiving opening, and means extended into the body of the skip for actuating the extension member, said last means lying within the path of material passing from the receiving opening through the skip, whereby the extension member forms a guard for the material while in loading position to direct the material into the skip and an extension of the apron when in discharging position to prevent the material being thrown out of the skip.

In testimony whereof I hereunto affix my signature.

ADOLPH W. RYBECK. 

